What have forecast of economic growth done consistently? Economic growth patterns decreased sharply from 1990-1991. Then they rose sharply and gradually leveled off up until 1999. However, inflation dropped steadily from 1990-1999. It decreased sharply at first and then leveled off from 1994--1994.

1- It over estimated economics growth from1990-1998
2- Underestimated economic growth from 1990-1998
3- Overestimated economic growth from 1996-1999
4- Underestimated economic growth from 1996-1999

I would think it would have been b. Because inflation is caused by an increase in money, decrease in money demand, decrease of goods, increase of demand for goods. So if inflation decreased there was more demand for money but no increase in good supply hence everything levelling out.

BUT I haven't studied economics at school only read up on it slightly...

Based on the information provided, the forecast of economic growth consistently overestimated economic growth from 1990-1998 and underestimated economic growth from 1996-1999.

To determine which statement accurately represents the forecast of economic growth, we need to analyze the given information. Let's break it down:

From 1990-1991:
- Economic growth patterns decreased sharply
- Inflation dropped steadily

From 1991-1999:
- Economic growth patterns rose sharply and gradually leveled off
- Inflation leveled off

Now let's evaluate the statements:

1- It overestimated economic growth from 1990-1998.
Based on the given information, it is stated that economic growth patterns decreased sharply from 1990-1991 and then gradually leveled off up until 1999. Therefore, this statement is incorrect.

2- It underestimated economic growth from 1990-1998.
Based on the given information, economic growth patterns rose sharply and gradually leveled off from 1991-1999, not decreased. Therefore, this statement is incorrect.

3- It overestimated economic growth from 1996-1999.
From the given information, there is no specific mention of economic growth from 1996-1999. Therefore, we cannot conclude whether economic growth was overestimated or underestimated during these years. Therefore, this statement is also incorrect.

4- It underestimated economic growth from 1996-1999.
As stated earlier, economic growth patterns rose sharply and gradually leveled off from 1991-1999. Therefore, it can be concluded that economic growth from 1996-1999 was underestimated. Hence, this statement is correct.

Therefore, the correct answer is:
4- Underestimated economic growth from 1996-1999.